Wrapper around some nearest neighbour searches integrated into manifold-rs

This is an interface into various (approximate) nearest neighbour searches implemented in the Rust crate ann-search-rs. They designed for incredible fast in-memory searches for kNN generation.

Usage

rs_approx_nearest_neighbours(data, k, ann_method, ann_params, seed, verbose)

Arguments

data

Numeric matrix. Shape of samples x n_dim for which to get the (approximate) nearest neighbours

k

Integer. Number of neighbours to return

ann_method

String. Which of the methods to use. One of c("hsnw", "balltree", "annoy", "nndescent")

ann_params

Named list. Contains the nearest neighbour parameters.

seed

Integer. Seed for reproducibility

verbose

Integer. If 0L -> silent or 1L for normal verbosity; 2L for detailed verbosity.

Value

A list with the following elements

• indices - flat representation of the indices.

• dist - flat representaitons of the distances.

• k - number of neighbours.

• n - number of samples.